Abstract: A counterweight system is disclosed, which is advantageously used for counterbalancing the table top of a vertically-adjustable drafting table. Obviously, the counterweight system could be used for other applications. When used in a drafting table of the type including a frame and a table top provided with vertical legs guided for up-and-down movement within the frame, cables are attached to the lower end of the two legs and are trained over a common pulley and attached to said pulley, which is freely rotatably mounted within the frame. A spiral-shape cam member is fixed to one side of the pulley and an additional cable which is attached to the pulley is trained over the cam member and attached at its other end to one end of tension springs, the other end of which is attached to the frame.

Abstract: A storage and selection apparatus for suspended sheets such as drawings characterized by having a sturdy mechanism to assist lifting any selected stack of sheets and by having selection pins which move endwise toward the pins of the selected stack of sheets for sustained accurate alignment of the pins and reliable transfer of sheets from the pins of the selected stack to the selection pins and vice versa.